diff options
| author | Michael Biebl <biebl@debian.org> | 2021-02-11 18:11:46 +0100 |
|---|---|---|
| committer | Michael Biebl <biebl@debian.org> | 2021-02-11 18:11:46 +0100 |
| commit | 80ec1decc49c72efec2a8b87c06245c92c0ab807 (patch) | |
| tree | e3b229aa94e8dcf0590f2317664176e7b8f7607b /src/core/devices/nm-device-wireguard.c | |
| parent | 65f86e8f56267192d42f2b629fc6b0c99fb9cd0c (diff) | |
New upstream version 1.29.90 upstream/1.29.90
Diffstat (limited to 'src/core/devices/nm-device-wireguard.c')
| -rw-r--r-- | src/core/devices/nm-device-wireguard.c | 2093 |
1 files changed, 2093 insertions, 0 deletions
diff --git a/src/core/devices/nm-device-wireguard.c b/src/core/devices/nm-device-wireguard.c new file mode 100644 index 00000000..fd057ded --- /dev/null +++ b/src/core/devices/nm-device-wireguard.c @@ -0,0 +1,2093 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2018 Javier Arteaga <jarteaga@jbeta.is> + */ + +#include "src/core/nm-default-daemon.h" + +#include "nm-device-wireguard.h" + +#include <linux/rtnetlink.h> +#include <linux/fib_rules.h> + +#include "nm-setting-wireguard.h" +#include "nm-core-internal.h" +#include "nm-glib-aux/nm-secret-utils.h" +#include "nm-device-private.h" +#include "platform/nm-platform.h" +#include "platform/nmp-object.h" +#include "platform/nmp-rules-manager.h" +#include "nm-device-factory.h" +#include "nm-active-connection.h" +#include "nm-act-request.h" +#include "dns/nm-dns-manager.h" + +#define _NMLOG_DEVICE_TYPE NMDeviceWireGuard +#include "nm-device-logging.h" + +/*****************************************************************************/ + +/* TODO: activate profile with peer preshared-key-flags=2. On first activation, the secret is + * requested (good). Enter it and connect. Reactivate the profile, now there is no password + * prompt, as the secret is cached (good??). */ + +/* TODO: unlike for other VPNs, we don't inject a direct route to the peers. That means, + * you might get a routing scenario where the peer (VPN server) is reachable via the VPN. + * How we handle adding routes to external gateway for other peers, has severe issues + * as well. We may use policy-routing like wg-quick does. See also discussions at + * https://www.wireguard.com/netns/#improving-the-classic-solutions */ + +/* TODO: honor the TTL of DNS to determine when to retry resolving endpoints. */ + +/* TODO: when we get multiple IP addresses when resolving a peer endpoint. We currently + * just take the first from GAI. We should only accept AAAA/IPv6 if we also have a suitable + * IPv6 address. The problem is, that we have to recheck that when IP addressing on other + * interfaces changes. This makes it almost too cumbersome to implement. */ + +/*****************************************************************************/ + +G_STATIC_ASSERT(NM_WIREGUARD_PUBLIC_KEY_LEN == NMP_WIREGUARD_PUBLIC_KEY_LEN); +G_STATIC_ASSERT(NM_WIREGUARD_SYMMETRIC_KEY_LEN == NMP_WIREGUARD_SYMMETRIC_KEY_LEN); + +/*****************************************************************************/ + +#define LINK_CONFIG_RATE_LIMIT_NSEC (50 * NM_UTILS_NSEC_PER_MSEC) + +/* a special @next_try_at_nsec timestamp indicating that we should try again as soon as possible. */ +#define NEXT_TRY_AT_NSEC_ASAP ((gint64) G_MAXINT64) + +/* a special @next_try_at_nsec timestamp that is + * - positive (indicating resolve-checks are enabled) + * - already in the past (we use the absolute timestamp of 1nsec for that). */ +#define NEXT_TRY_AT_NSEC_PAST ((gint64) 1) + +/* like %NEXT_TRY_AT_NSEC_ASAP, but used for indicating to retry ASAP for a @retry_in_msec value. + * That is a relative time duration, contrary to @next_try_at_nsec which is an absolute + * timestamp. */ +#define RETRY_IN_MSEC_ASAP ((gint64) G_MAXINT64) + +#define RETRY_IN_MSEC_MAX ((gint64)(30 * 60 * 1000)) + +typedef enum { + LINK_CONFIG_MODE_FULL, + LINK_CONFIG_MODE_REAPPLY, + LINK_CONFIG_MODE_ASSUME, + LINK_CONFIG_MODE_ENDPOINTS, +} LinkConfigMode; + +typedef struct { + GCancellable *cancellable; + + NMSockAddrUnion sockaddr; + + /* the timestamp (in nm_utils_get_monotonic_timestamp_nsec() scale) when we want + * to retry resolving the endpoint (again). + * + * It may be set to %NEXT_TRY_AT_NSEC_ASAP to indicate to re-resolve as soon as possible. + * + * A @sockaddr is either fixed or it has + * - @cancellable set to indicate an ongoing request + * - @next_try_at_nsec set to a positive value, indicating when + * we ought to retry. */ + gint64 next_try_at_nsec; + + guint resolv_fail_count; +} PeerEndpointResolveData; + +typedef struct { + NMWireGuardPeer *peer; + + NMDeviceWireGuard *self; + + CList lst_peers; + + PeerEndpointResolveData ep_resolv; + + /* dirty flag used during _peers_update_all(). */ + bool dirty_update_all : 1; +} PeerData; + +NM_GOBJECT_PROPERTIES_DEFINE(NMDeviceWireGuard, PROP_PUBLIC_KEY, PROP_LISTEN_PORT, PROP_FWMARK, ); + +typedef struct { + NMDnsManager *dns_manager; + + NMPlatformLnkWireGuard lnk_curr; + NMActRequestGetSecretsCallId *secrets_call_id; + + CList lst_peers_head; + GHashTable *peers; + + /* counts the numbers of peers that are currently resolving. */ + guint peers_resolving_cnt; + + gint64 resolve_next_try_at; + gint64 link_config_last_at; + + guint resolve_next_try_id; + guint link_config_delayed_id; + + guint32 auto_default_route_fwmark; + + guint32 auto_default_route_priority; + + bool auto_default_route_enabled_4 : 1; + bool auto_default_route_enabled_6 : 1; + bool auto_default_route_initialized : 1; + bool auto_default_route_refresh : 1; + bool auto_default_route_priority_initialized : 1; + +} NMDeviceWireGuardPrivate; + +struct _NMDeviceWireGuard { + NMDevice parent; + NMDeviceWireGuardPrivate _priv; +}; + +struct _NMDeviceWireGuardClass { + NMDeviceClass parent; +}; + +G_DEFINE_TYPE(NMDeviceWireGuard, nm_device_wireguard, NM_TYPE_DEVICE) + +#define NM_DEVICE_WIREGUARD_GET_PRIVATE(self) \ + _NM_GET_PRIVATE(self, NMDeviceWireGuard, NM_IS_DEVICE_WIREGUARD, NMDevice) + +/*****************************************************************************/ + +static void _peers_resolve_start(NMDeviceWireGuard *self, PeerData *peer_data); + +static void _peers_resolve_retry_reschedule(NMDeviceWireGuard *self, gint64 new_next_try_at_nsec); + +static gboolean link_config_delayed_resolver_cb(gpointer user_data); + +static gboolean link_config_delayed_ratelimit_cb(gpointer user_data); + +/*****************************************************************************/ + +static NM_UTILS_LOOKUP_STR_DEFINE(_link_config_mode_to_string, + LinkConfigMode, + NM_UTILS_LOOKUP_DEFAULT_NM_ASSERT(NULL), + NM_UTILS_LOOKUP_ITEM(LINK_CONFIG_MODE_FULL, "full"), + NM_UTILS_LOOKUP_ITEM(LINK_CONFIG_MODE_REAPPLY, "reapply"), + NM_UTILS_LOOKUP_ITEM(LINK_CONFIG_MODE_ASSUME, "assume"), + NM_UTILS_LOOKUP_ITEM(LINK_CONFIG_MODE_ENDPOINTS, "endpoints"), ); + +/*****************************************************************************/ + +static void +_auto_default_route_get_enabled(NMSettingWireGuard *s_wg, + NMConnection * connection, + gboolean * out_enabled_v4, + gboolean * out_enabled_v6) +{ + NMTernary enabled_v4; + NMTernary enabled_v6; + + enabled_v4 = nm_setting_wireguard_get_ip4_auto_default_route(s_wg); + enabled_v6 = nm_setting_wireguard_get_ip6_auto_default_route(s_wg); + + if (enabled_v4 == NM_TERNARY_DEFAULT) { + if (nm_setting_ip_config_get_never_default( + nm_connection_get_setting_ip_config(connection, AF_INET))) + enabled_v4 = FALSE; + } + if (enabled_v6 == NM_TERNARY_DEFAULT) { + if (nm_setting_ip_config_get_never_default( + nm_connection_get_setting_ip_config(connection, AF_INET6))) + enabled_v6 = FALSE; + } + + if (enabled_v4 == NM_TERNARY_DEFAULT || enabled_v6 == NM_TERNARY_DEFAULT) { + guint i, n_peers; + + n_peers = nm_setting_wireguard_get_peers_len(s_wg); + for (i = 0; i < n_peers; i++) { + NMWireGuardPeer *peer = nm_setting_wireguard_get_peer(s_wg, i); + guint n_aips; + guint j; + + n_aips = nm_wireguard_peer_get_allowed_ips_len(peer); + for (j = 0; j < n_aips; j++) { + const char *aip; + gboolean valid; + int prefix; + int addr_family; + + aip = nm_wireguard_peer_get_allowed_ip(peer, j, &valid); + if (!valid) + continue; + if (!nm_utils_parse_inaddr_prefix_bin(AF_UNSPEC, aip, &addr_family, NULL, &prefix)) + continue; + if (prefix != 0) + continue; + + if (addr_family == AF_INET) { + if (enabled_v4 == NM_TERNARY_DEFAULT) { + enabled_v4 = TRUE; + if (enabled_v6 != NM_TERNARY_DEFAULT) + goto done; + } + } else { + if (enabled_v6 == NM_TERNARY_DEFAULT) { + enabled_v6 = TRUE; + if (enabled_v4 != NM_TERNARY_DEFAULT) + goto done; + } + } + } + } +done:; + } + + *out_enabled_v4 = (enabled_v4 == TRUE); + *out_enabled_v6 = (enabled_v6 == TRUE); +} + +#define AUTO_RANDOM_RANGE 500u + +static guint32 +_auto_default_route_get_auto_fwmark(const char *uuid) +{ + guint64 rnd_seed; + + /* we use the generated number as fwmark but also as routing table for + * the default-route. + * + * We pick a number + * + * - based on the connection's UUID (as stable seed). + * - larger than 51820u (arbitrarily) + * - one out of AUTO_RANDOM_RANGE + */ + + rnd_seed = c_siphash_hash(NM_HASH_SEED_16(0xb9, + 0x39, + 0x8e, + 0xed, + 0x15, + 0xb3, + 0xd1, + 0xc4, + 0x5f, + 0x45, + 0x00, + 0x4f, + 0xec, + 0xc2, + 0x2b, + 0x7e), + (const guint8 *) uuid, + uuid ? strlen(uuid) + 1u : 0u); + + return 51820u + (rnd_seed % AUTO_RANDOM_RANGE); +} + +#define PRIO_WIDTH 2u + +static guint32 +_auto_default_route_get_auto_priority(const char *uuid) +{ + const guint32 RANGE_TOP = 32766u - 1000u; + guint64 rnd_seed; + + /* we pick a priority for the routing rules as follows: + * + * - use the connection's UUID as stable seed for the "random" number. + * - have it smaller than RANGE_TOP (32766u - 1000u), where 32766u is the priority of the default + * rules + * - we add 2 rules (PRIO_WIDTH). Hence only pick even priorities. + * - pick one out of AUTO_RANDOM_RANGE. */ + + rnd_seed = c_siphash_hash(NM_HASH_SEED_16(0x99, + 0x22, + 0x4d, + 0x7c, + 0x37, + 0xda, + 0x8e, + 0x7b, + 0x2f, + 0x55, + 0x16, + 0x7b, + 0x75, + 0xda, + 0x42, + 0xdc), + (const guint8 *) uuid, + uuid ? strlen(uuid) + 1u : 0u); + + return RANGE_TOP - (((rnd_seed % (PRIO_WIDTH * AUTO_RANDOM_RANGE)) / PRIO_WIDTH) * PRIO_WIDTH); +} + +static void +_auto_default_route_init(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + NMConnection * connection; + gboolean enabled_v4 = FALSE; + gboolean enabled_v6 = FALSE; + gboolean refreshing_only; + guint32 new_fwmark = 0; + guint32 old_fwmark; + char sbuf1[100]; + + if (G_LIKELY(priv->auto_default_route_initialized && !priv->auto_default_route_refresh)) + return; + + refreshing_only = priv->auto_default_route_initialized && priv->auto_default_route_refresh; + + old_fwmark = priv->auto_default_route_fwmark; + + connection = nm_device_get_applied_connection(NM_DEVICE(self)); + if (connection) { + NMSettingWireGuard *s_wg; + + s_wg = _nm_connection_get_setting(connection, NM_TYPE_SETTING_WIREGUARD); + + new_fwmark = nm_setting_wireguard_get_fwmark(s_wg); + + _auto_default_route_get_enabled(s_wg, connection, &enabled_v4, &enabled_v6); + } + + if ((enabled_v4 || enabled_v6) && new_fwmark == 0u) { + if (refreshing_only) + new_fwmark = old_fwmark; + else + new_fwmark = _auto_default_route_get_auto_fwmark(nm_connection_get_uuid(connection)); + } + + priv->auto_default_route_refresh = FALSE; + priv->auto_default_route_fwmark = new_fwmark; + priv->auto_default_route_enabled_4 = enabled_v4; + priv->auto_default_route_enabled_6 = enabled_v6; + priv->auto_default_route_initialized = TRUE; + + if (connection) { + _LOGT(LOGD_DEVICE, + "auto-default-route is %s for IPv4 and %s for IPv6%s", + priv->auto_default_route_enabled_4 ? "enabled" : "disabled", + priv->auto_default_route_enabled_6 ? "enabled" : "disabled", + priv->auto_default_route_enabled_4 || priv->auto_default_route_enabled_6 + ? nm_sprintf_buf(sbuf1, " (fwmark 0x%x)", priv->auto_default_route_fwmark) + : ""); + } +} + +static GPtrArray * +get_extra_rules(NMDevice *device) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(device); + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + gs_unref_ptrarray GPtrArray *extra_rules = NULL; + guint32 priority = 0; + int is_ipv4; + NMConnection * connection; + + _auto_default_route_init(self); + + connection = nm_device_get_applied_connection(device); + if (!connection) + return NULL; + + for (is_ipv4 = 0; is_ipv4 < 2; is_ipv4++) { + NMSettingIPConfig *s_ip; + int addr_family = is_ipv4 ? AF_INET : AF_INET6; + guint32 table_main; + guint32 fwmark; + + if (is_ipv4) { + if (!priv->auto_default_route_enabled_4) + continue; + } else { + if (!priv->auto_default_route_enabled_6) + continue; + } + + if (!extra_rules) { + if (priv->auto_default_route_priority_initialized) + priority = priv->auto_default_route_priority; + else { + priority = + _auto_default_route_get_auto_priority(nm_connection_get_uuid(connection)); + priv->auto_default_route_priority = priority; + priv->auto_default_route_priority_initialized = TRUE; + } + extra_rules = g_ptr_array_new_with_free_func((GDestroyNotify) nmp_object_unref); + } + + s_ip = nm_connection_get_setting_ip_config(connection, addr_family); + table_main = nm_setting_ip_config_get_route_table(s_ip); + if (table_main == 0) + table_main = RT_TABLE_MAIN; + + fwmark = priv->auto_default_route_fwmark; + + G_STATIC_ASSERT_EXPR(PRIO_WIDTH == 2); + + g_ptr_array_add(extra_rules, + nmp_object_new(NMP_OBJECT_TYPE_ROUTING_RULE, + &((const NMPlatformRoutingRule){ + .priority = priority, + .addr_family = addr_family, + .action = FR_ACT_TO_TBL, + .table = table_main, + .suppress_prefixlen_inverse = ~((guint32) 0u), + }))); + + g_ptr_array_add(extra_rules, + nmp_object_new(NMP_OBJECT_TYPE_ROUTING_RULE, + &((const NMPlatformRoutingRule){ + .priority = priority + 1u, + .addr_family = addr_family, + .action = FR_ACT_TO_TBL, + .table = fwmark, + .flags = FIB_RULE_INVERT, + .fwmark = fwmark, + .fwmask = 0xFFFFFFFFu, + }))); + } + + return g_steal_pointer(&extra_rules); +} + +static guint32 +coerce_route_table(NMDevice *device, int addr_family, guint32 route_table, gboolean is_user_config) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(device); + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + gboolean auto_default_route_enabled; + + if (route_table != 0u) + return route_table; + + _auto_default_route_init(self); + + auto_default_route_enabled = (addr_family == AF_INET) ? priv->auto_default_route_enabled_4 + : priv->auto_default_route_enabled_6; + + if (auto_default_route_enabled) { + /* we need to enable full-sync mode of all routing tables. */ + _LOGT(LOGD_DEVICE, + "coerce ipv%c.route-table setting to \"main\" (table 254) as we enable " + "auto-default-route handling", + nm_utils_addr_family_to_char(addr_family)); + return RT_TABLE_MAIN; + } + + return 0; +} + +/*****************************************************************************/ + +static gboolean +_peer_data_equal(gconstpointer ptr_a, gconstpointer ptr_b) +{ + const PeerData *peer_data_a = ptr_a; + const PeerData *peer_data_b = ptr_b; + + return nm_streq(nm_wireguard_peer_get_public_key(peer_data_a->peer), + nm_wireguard_peer_get_public_key(peer_data_b->peer)); +} + +static guint +_peer_data_hash(gconstpointer ptr) +{ + const PeerData *peer_data = ptr; + + return nm_hash_str(nm_wireguard_peer_get_public_key(peer_data->peer)); +} + +static PeerData * +_peers_find(NMDeviceWireGuardPrivate *priv, NMWireGuardPeer *peer) +{ + nm_assert(peer); + + G_STATIC_ASSERT_EXPR(G_STRUCT_OFFSET(PeerData, peer) == 0); + + return g_hash_table_lookup(priv->peers, &peer); +} + +static guint +_peers_resolving_cnt(NMDeviceWireGuardPrivate *priv) +{ + nm_assert(priv); +#if NM_MORE_ASSERTS > 3 + { + PeerData *peer_data; + guint cnt = 0; + + c_list_for_each_entry (peer_data, &priv->lst_peers_head, lst_peers) { + if (peer_data->ep_resolv.cancellable) + cnt++; + } + nm_assert(cnt == priv->peers_resolving_cnt); + } +#endif + + return priv->peers_resolving_cnt; +} + +static void +_peers_resolving_cnt_decrement(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + nm_assert(priv); + nm_assert(priv->peers_resolving_cnt > 0); + + priv->peers_resolving_cnt--; + + nm_assert(_peers_resolving_cnt(priv) == priv->peers_resolving_cnt); + + if (priv->peers_resolving_cnt == 0) { + if (nm_device_get_state(NM_DEVICE(self)) == NM_DEVICE_STATE_CONFIG) { + _LOGT(LOGD_DEVICE, + "activation delayed to resolve DNS names of peers: completed, proceed now"); + nm_device_activate_schedule_stage2_device_config(NM_DEVICE(self), FALSE); + } + } +} + +static void +_peers_remove(NMDeviceWireGuard *self, PeerData *peer_data) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + nm_assert(peer_data); + nm_assert(g_hash_table_lookup(priv->peers, peer_data) == peer_data); + + if (!g_hash_table_remove(priv->peers, peer_data)) + nm_assert_not_reached(); + + c_list_unlink_stale(&peer_data->lst_peers); + nm_wireguard_peer_unref(peer_data->peer); + if (nm_clear_g_cancellable(&peer_data->ep_resolv.cancellable)) + _peers_resolving_cnt_decrement(self); + g_slice_free(PeerData, peer_data); + + if (c_list_is_empty(&priv->lst_peers_head)) { + nm_clear_g_source(&priv->resolve_next_try_id); + nm_clear_g_source(&priv->link_config_delayed_id); + } + + nm_assert(_peers_resolving_cnt(priv) == priv->peers_resolving_cnt); +} + +static PeerData * +_peers_add(NMDeviceWireGuard *self, NMWireGuardPeer *peer) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + PeerData * peer_data; + + nm_assert(peer); + nm_assert(nm_wireguard_peer_is_sealed(peer)); + nm_assert(!_peers_find(priv, peer)); + + peer_data = g_slice_new(PeerData); + *peer_data = (PeerData){ + .self = self, + .peer = nm_wireguard_peer_ref(peer), + .ep_resolv = + { + .sockaddr = NM_SOCK_ADDR_UNION_INIT_UNSPEC, + }, + }; + + c_list_link_tail(&priv->lst_peers_head, &peer_data->lst_peers); + if (!nm_g_hash_table_add(priv->peers, peer_data)) + nm_assert_not_reached(); + return peer_data; +} + +static gboolean +_peers_resolve_retry_timeout(gpointer user_data) +{ + NMDeviceWireGuard * self = user_data; + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + PeerData * peer_data; + gint64 now; + gint64 next; + + priv->resolve_next_try_id = 0; + + _LOGT(LOGD_DEVICE, "wireguard-peers: rechecking peer endpoints..."); + + now = nm_utils_get_monotonic_timestamp_nsec(); + next = G_MAXINT64; + c_list_for_each_entry (peer_data, &priv->lst_peers_head, lst_peers) { + if (peer_data->ep_resolv.next_try_at_nsec <= 0) + continue; + + if (peer_data->ep_resolv.cancellable) { + /* we are currently resolving a name. We don't need the global + * watchdog to guard this peer. No need to adjust @next for + * this one, when the currently ongoing resolving completes, we + * may reschedule. Skip. */ + continue; + } + + if (peer_data->ep_resolv.next_try_at_nsec == NEXT_TRY_AT_NSEC_ASAP + || now >= peer_data->ep_resolv.next_try_at_nsec) { + _peers_resolve_start(self, peer_data); + /* same here. Now we are resolving. We don't need the global + * watchdog. Skip w.r.t. finding @next. */ + continue; + } + + if (next > peer_data->ep_resolv.next_try_at_nsec) + next = peer_data->ep_resolv.next_try_at_nsec; + } + if (next < G_MAXINT64) + _peers_resolve_retry_reschedule(self, next); + + return G_SOURCE_REMOVE; +} + +static void +_peers_resolve_retry_reschedule(NMDeviceWireGuard *self, gint64 new_next_try_at_nsec) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + guint32 interval_ms; + gint64 now; + + nm_assert(new_next_try_at_nsec > 0); + nm_assert(new_next_try_at_nsec != NEXT_TRY_AT_NSEC_ASAP); + + if (priv->resolve_next_try_id && priv->resolve_next_try_at <= new_next_try_at_nsec) { + /* we already have an earlier timeout scheduled (possibly for + * another peer that expires sooner). Don't reschedule now. + * Even if the scheduled timeout expires too early, we will + * compute the right next-timeout and reschedule then. */ + return; + } + + now = nm_utils_get_monotonic_timestamp_nsec(); + + /* schedule at most one day ahead. No problem if we expire earlier + * than expected. Also, rate-limit to 500 msec. */ + interval_ms = NM_CLAMP((new_next_try_at_nsec - now) / NM_UTILS_NSEC_PER_MSEC, + (gint64) 500, + (gint64)(24 * 60 * 60 * 1000)); + + _LOGT(LOGD_DEVICE, + "wireguard-peers: schedule rechecking peer endpoints in %u msec", + interval_ms); + + nm_clear_g_source(&priv->resolve_next_try_id); + priv->resolve_next_try_at = new_next_try_at_nsec; + priv->resolve_next_try_id = g_timeout_add(interval_ms, _peers_resolve_retry_timeout, self); +} + +static void +_peers_resolve_retry_reschedule_for_peer(NMDeviceWireGuard *self, + PeerData * peer_data, + gint64 retry_in_msec) +{ + nm_assert(retry_in_msec >= 0); + + if (retry_in_msec == RETRY_IN_MSEC_ASAP) { + _peers_resolve_start(self, peer_data); + return; + } + + peer_data->ep_resolv.next_try_at_nsec = + nm_utils_get_monotonic_timestamp_nsec() + (retry_in_msec * NM_UTILS_NSEC_PER_MSEC); + _peers_resolve_retry_reschedule(self, peer_data->ep_resolv.next_try_at_nsec); +} + +static gint64 +_peers_retry_in_msec(PeerData *peer_data, gboolean after_failure) +{ + if (peer_data->ep_resolv.next_try_at_nsec == NEXT_TRY_AT_NSEC_ASAP) { + peer_data->ep_resolv.resolv_fail_count = 0; + return RETRY_IN_MSEC_ASAP; + } + + if (after_failure) { + if (peer_data->ep_resolv.resolv_fail_count < G_MAXUINT) + peer_data->ep_resolv.resolv_fail_count++; + } else + peer_data->ep_resolv.resolv_fail_count = 0; + + if (!after_failure) + return RETRY_IN_MSEC_MAX; + + if (peer_data->ep_resolv.resolv_fail_count > 20) + return RETRY_IN_MSEC_MAX; + + /* double the retry-time, starting with one second. */ + return NM_MIN(RETRY_IN_MSEC_MAX, (1u << peer_data->ep_resolv.resolv_fail_count) * 500); +} + +static void +_peers_resolve_cb(GObject *source_object, GAsyncResult *res, gpointer user_data) +{ + NMDeviceWireGuard * self; + NMDeviceWireGuardPrivate *priv; + PeerData * peer_data; + gs_free_error GError *resolv_error = NULL; + GList * list; + gboolean changed = FALSE; + NMSockAddrUnion sockaddr; + gint64 retry_in_msec; + char s_sockaddr[100]; + char s_retry[100]; + + list = g_resolver_lookup_by_name_finish(G_RESOLVER(source_object), res, &resolv_error); + + if (nm_utils_error_is_cancelled(resolv_error)) + return; + + peer_data = user_data; + self = peer_data->self; + priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + if (nm_clear_g_object(&peer_data->ep_resolv.cancellable)) + _peers_resolving_cnt_decrement(self); + + nm_assert((!resolv_error) != (!list)); + nm_assert(_peers_resolving_cnt(priv) == priv->peers_resolving_cnt); + +#define _retry_in_msec_to_string(retry_in_msec, s_retry) \ + ({ \ + gint64 _retry_in_msec = (retry_in_msec); \ + \ + _retry_in_msec == RETRY_IN_MSEC_ASAP \ + ? "right away" \ + : nm_sprintf_buf(s_retry, "in %" G_GINT64_FORMAT " msec", _retry_in_msec); \ + }) + + if (resolv_error + && !g_error_matches(resolv_error, G_RESOLVER_ERROR, G_RESOLVER_ERROR_NOT_FOUND)) { + retry_in_msec = _peers_retry_in_msec(peer_data, TRUE); + + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: failure to resolve endpoint \"%s\": %s (retry %s)", + nm_wireguard_peer_get_public_key(peer_data->peer), + nm_wireguard_peer_get_endpoint(peer_data->peer), + resolv_error->message, + _retry_in_msec_to_string(retry_in_msec, s_retry)); + + _peers_resolve_retry_reschedule_for_peer(self, peer_data, retry_in_msec); + return; + } + + sockaddr = (NMSockAddrUnion) NM_SOCK_ADDR_UNION_INIT_UNSPEC; + + if (!resolv_error) { + GList *iter; + + for (iter = list; iter; iter = iter->next) { + GInetAddress *a = iter->data; + GSocketFamily f = g_inet_address_get_family(a); + + if (f == G_SOCKET_FAMILY_IPV4) { + nm_assert(g_inet_address_get_native_size(a) == sizeof(struct in_addr)); + sockaddr.in = (struct sockaddr_in){ + .sin_family = AF_INET, + .sin_port = htons(nm_sock_addr_endpoint_get_port( + _nm_wireguard_peer_get_endpoint(peer_data->peer))), + }; + memcpy(&sockaddr.in.sin_addr, g_inet_address_to_bytes(a), sizeof(struct in_addr)); + break; + } + if (f == G_SOCKET_FAMILY_IPV6) { + nm_assert(g_inet_address_get_native_size(a) == sizeof(struct in6_addr)); + sockaddr.in6 = (struct sockaddr_in6){ + .sin6_family = AF_INET6, + .sin6_port = htons(nm_sock_addr_endpoint_get_port( + _nm_wireguard_peer_get_endpoint(peer_data->peer))), + .sin6_scope_id = 0, + .sin6_flowinfo = 0, + }; + memcpy(&sockaddr.in6.sin6_addr, + g_inet_address_to_bytes(a), + sizeof(struct in6_addr)); + break; + } + } + + g_list_free_full(list, g_object_unref); + } + + if (sockaddr.sa.sa_family == AF_UNSPEC) { + /* we failed to resolve the name. There is no need to reset the previous + * sockaddr. Either it was already AF_UNSPEC, or we had a good name + * from resolving before. In that case, we don't want to throw away + * a possibly good IP address, since WireGuard supports automatic roaming + * anyway. Either the IP address is still good (and we would wrongly + * reject it), or it isn't -- in which case it does not hurt much. */ + } else { + if (nm_sock_addr_union_cmp(&peer_data->ep_resolv.sockaddr, &sockaddr) != 0) + changed = TRUE; + peer_data->ep_resolv.sockaddr = sockaddr; + } + + if (resolv_error || peer_data->ep_resolv.sockaddr.sa.sa_family == AF_UNSPEC) { + /* while it technically did not fail, something is probably odd. Retry frequently to + * resolve the name, like we would do for normal failures. */ + retry_in_msec = _peers_retry_in_msec(peer_data, TRUE); + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: no %sresults for endpoint \"%s\" (retry %s)", + nm_wireguard_peer_get_public_key(peer_data->peer), + resolv_error ? "" : "suitable ", + nm_wireguard_peer_get_endpoint(peer_data->peer), + _retry_in_msec_to_string(retry_in_msec, s_retry)); + } else { + retry_in_msec = _peers_retry_in_msec(peer_data, FALSE); + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: endpoint \"%s\" resolved to %s (retry %s)", + nm_wireguard_peer_get_public_key(peer_data->peer), + nm_wireguard_peer_get_endpoint(peer_data->peer), + nm_sock_addr_union_to_string(&peer_data->ep_resolv.sockaddr, + s_sockaddr, + sizeof(s_sockaddr)), + _retry_in_msec_to_string(retry_in_msec, s_retry)); + } + + _peers_resolve_retry_reschedule_for_peer(self, peer_data, retry_in_msec); + + if (changed) { + /* schedule the job in the background, to give multiple resolve events time + * to complete. */ + nm_clear_g_source(&priv->link_config_delayed_id); + priv->link_config_delayed_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE + 1, + link_config_delayed_resolver_cb, + self, + NULL); + } +} + +static void +_peers_resolve_start(NMDeviceWireGuard *self, PeerData *peer_data) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + gs_unref_object GResolver *resolver = NULL; + const char * host; + + resolver = g_resolver_get_default(); + + nm_assert(!peer_data->ep_resolv.cancellable); + + peer_data->ep_resolv.cancellable = g_cancellable_new(); + priv->peers_resolving_cnt++; + + /* set a special next-try timestamp. It is positive, and indicates + * that we are in the process of trying. + * This timestamp however already lies in the past, but that is correct, + * because we are currently in the process of trying. We will determine + * a next-try timestamp once the try completes. */ + peer_data->ep_resolv.next_try_at_nsec = NEXT_TRY_AT_NSEC_PAST; + + host = nm_sock_addr_endpoint_get_host(_nm_wireguard_peer_get_endpoint(peer_data->peer)); + + g_resolver_lookup_by_name_async(resolver, + host, + peer_data->ep_resolv.cancellable, + _peers_resolve_cb, + peer_data); + + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: resolving name \"%s\" for endpoint \"%s\"...", + nm_wireguard_peer_get_public_key(peer_data->peer), + host, + nm_wireguard_peer_get_endpoint(peer_data->peer)); + + nm_assert(_peers_resolving_cnt(priv) == priv->peers_resolving_cnt); +} + +static void +_peers_resolve_reresolve_all(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + PeerData * peer_data; + + c_list_for_each_entry (peer_data, &priv->lst_peers_head, lst_peers) { + if (peer_data->ep_resolv.cancellable) { + /* remember to retry when the currently ongoing request completes. */ + peer_data->ep_resolv.next_try_at_nsec = NEXT_TRY_AT_NSEC_ASAP; + } else if (peer_data->ep_resolv.next_try_at_nsec <= 0) { + /* this peer does not require resolving the name. Skip it. */ + } else { + /* we have a next-try scheduled. Restart right away. */ + peer_data->ep_resolv.resolv_fail_count = 0; + _peers_resolve_start(self, peer_data); + } + } +} + +static gboolean +_peers_update(NMDeviceWireGuard *self, + PeerData * peer_data, + NMWireGuardPeer * peer, + gboolean force_update) +{ + nm_auto_unref_wgpeer NMWireGuardPeer *old_peer = NULL; + NMSockAddrEndpoint * old_endpoint; + NMSockAddrEndpoint * endpoint; + gboolean endpoint_changed = FALSE; + gboolean changed; + NMSockAddrUnion sockaddr; + gboolean sockaddr_fixed; + char sockaddr_sbuf[100]; + + nm_assert(peer); + nm_assert(nm_wireguard_peer_is_sealed(peer)); + + if (peer == peer_data->peer && !force_update) + return FALSE; + + changed = (nm_wireguard_peer_cmp(peer, peer_data->peer, NM_SETTING_COMPARE_FLAG_EXACT) != 0); + + old_peer = peer_data->peer; + peer_data->peer = nm_wireguard_peer_ref(peer); + + old_endpoint = old_peer ? _nm_wireguard_peer_get_endpoint(old_peer) : NULL; + endpoint = peer ? _nm_wireguard_peer_get_endpoint(peer) : NULL; + + endpoint_changed = (endpoint != old_endpoint + && (!old_endpoint || !endpoint + || !nm_streq(nm_sock_addr_endpoint_get_endpoint(old_endpoint), + nm_sock_addr_endpoint_get_endpoint(endpoint)))); + + if (!force_update && !endpoint_changed) { + /* nothing to do. */ + return changed; + } + + sockaddr = (NMSockAddrUnion) NM_SOCK_ADDR_UNION_INIT_UNSPEC; + sockaddr_fixed = TRUE; + if (endpoint && nm_sock_addr_endpoint_get_host(endpoint)) { + if (!nm_sock_addr_endpoint_get_fixed_sockaddr(endpoint, &sockaddr)) { + /* we have an endpoint, but it's not a static IP address. We need to resolve + * the names. */ + sockaddr_fixed = FALSE; + } + } + + if (nm_sock_addr_union_cmp(&peer_data->ep_resolv.sockaddr, &sockaddr) != 0) + changed = TRUE; + + if (nm_clear_g_cancellable(&peer_data->ep_resolv.cancellable)) + _peers_resolving_cnt_decrement(self); + + peer_data->ep_resolv = (PeerEndpointResolveData){ + .sockaddr = sockaddr, + .resolv_fail_count = 0, + .cancellable = NULL, + .next_try_at_nsec = 0, + }; + + if (!endpoint) { + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: no endpoint configured", + nm_wireguard_peer_get_public_key(peer_data->peer)); + } else if (!nm_sock_addr_endpoint_get_host(endpoint)) { + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: invalid endpoint \"%s\"", + nm_wireguard_peer_get_public_key(peer_data->peer), + nm_sock_addr_endpoint_get_endpoint(endpoint)); + } else if (sockaddr_fixed) { + _LOGT(LOGD_DEVICE, + "wireguard-peer[%s]: fixed endpoint \"%s\" (%s)", + nm_wireguard_peer_get_public_key(peer_data->peer), + nm_sock_addr_endpoint_get_endpoint(endpoint), + nm_sock_addr_union_to_string(&peer_data->ep_resolv.sockaddr, + sockaddr_sbuf, + sizeof(sockaddr_sbuf))); + } else + _peers_resolve_start(self, peer_data); + + return changed; +} + +static void +_peers_remove_all(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + PeerData * peer_data; + + while ((peer_data = c_list_first_entry(&priv->lst_peers_head, PeerData, lst_peers))) + _peers_remove(self, peer_data); +} + +static void +_peers_update_all(NMDeviceWireGuard *self, NMSettingWireGuard *s_wg, gboolean *out_peers_removed) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + PeerData * peer_data_safe; + PeerData * peer_data; + guint i, n; + gboolean peers_removed = FALSE; + + c_list_for_each_entry (peer_data, &priv->lst_peers_head, lst_peers) + peer_data->dirty_update_all = TRUE; + + n = nm_setting_wireguard_get_peers_len(s_wg); + for (i = 0; i < n; i++) { + NMWireGuardPeer *peer = nm_setting_wireguard_get_peer(s_wg, i); + gboolean added = FALSE; + + peer_data = _peers_find(priv, peer); + if (!peer_data) { + peer_data = _peers_add(self, peer); + added = TRUE; + } + _peers_update(self, peer_data, peer, added); + peer_data->dirty_update_all = FALSE; + } + + c_list_for_each_entry_safe (peer_data, peer_data_safe, &priv->lst_peers_head, lst_peers) { + if (peer_data->dirty_update_all) { + _peers_remove(self, peer_data); + peers_removed = TRUE; + } + } + + NM_SET_OUT(out_peers_removed, peers_removed); +} + +static void +_peers_get_platform_list(NMDeviceWireGuardPrivate * priv, + LinkConfigMode config_mode, + NMPWireGuardPeer ** out_peers, + NMPlatformWireGuardChangePeerFlags **out_peer_flags, + guint * out_len, + GArray ** out_allowed_ips_data) +{ + gs_free NMPWireGuardPeer *plpeers = NULL; + gs_free NMPlatformWireGuardChangePeerFlags *plpeer_flags = NULL; + gs_unref_array GArray *allowed_ips = NULL; + PeerData * peer_data; + guint i_good; + guint n_aip; + guint i_aip; + guint len; + guint i; + + nm_assert(out_peers && !*out_peers); + nm_assert(out_peer_flags && !*out_peer_flags); + nm_assert(out_len && *out_len == 0); + nm_assert(out_allowed_ips_data && !*out_allowed_ips_data); + + len = g_hash_table_size(priv->peers); + + nm_assert(len == c_list_length(&priv->lst_peers_head)); + + if (len == 0) + return; + + plpeers = g_new0(NMPWireGuardPeer, len); + plpeer_flags = g_new0(NMPlatformWireGuardChangePeerFlags, len); + + i_good = 0; + c_list_for_each_entry (peer_data, &priv->lst_peers_head, lst_peers) { + NMPlatformWireGuardChangePeerFlags *plf = &plpeer_flags[i_good]; + NMPWireGuardPeer * plp = &plpeers[i_good]; + NMSettingSecretFlags psk_secret_flags; + + if (!nm_utils_base64secret_decode(nm_wireguard_peer_get_public_key(peer_data->peer), + sizeof(plp->public_key), + plp->public_key)) + continue; + + *plf = NM_PLATFORM_WIREGUARD_CHANGE_PEER_FLAG_NONE; + + plp->persistent_keepalive_interval = + nm_wireguard_peer_get_persistent_keepalive(peer_data->peer); + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL, LINK_CONFIG_MODE_REAPPLY)) + *plf |= NM_PLATFORM_WIREGUARD_CHANGE_PEER_FLAG_HAS_KEEPALIVE_INTERVAL; + + /* if the peer has an endpoint but it is not yet resolved (not ready), + * we still configure it and leave the endpoint unspecified. Later, + * when we can resolve the endpoint, we will update. */ + plp->endpoint = peer_data->ep_resolv.sockaddr; + if (plp->endpoint.sa.sa_family == AF_UNSPEC) { + /* we don't actually ever clear endpoints, if we don't have better information. */ + } else + *plf |= NM_PLATFORM_WIREGUARD_CHANGE_PEER_FLAG_HAS_ENDPOINT; + + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL, LINK_CONFIG_MODE_REAPPLY)) { + psk_secret_flags = nm_wireguard_peer_get_preshared_key_flags(peer_data->peer); + if (!NM_FLAGS_HAS(psk_secret_flags, NM_SETTING_SECRET_FLAG_NOT_REQUIRED)) { + if (!nm_utils_base64secret_decode( + nm_wireguard_peer_get_preshared_key(peer_data->peer), + sizeof(plp->preshared_key), + plp->preshared_key) + && config_mode == LINK_CONFIG_MODE_FULL) + goto skip; + } + *plf |= NM_PLATFORM_WIREGUARD_CHANGE_PEER_FLAG_HAS_PRESHARED_KEY; + } + + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL, LINK_CONFIG_MODE_REAPPLY) + && ((n_aip = nm_wireguard_peer_get_allowed_ips_len(peer_data->peer)) > 0)) { + if (!allowed_ips) + allowed_ips = g_array_new(FALSE, FALSE, sizeof(NMPWireGuardAllowedIP)); + + *plf |= NM_PLATFORM_WIREGUARD_CHANGE_PEER_FLAG_HAS_ALLOWEDIPS + | NM_PLATFORM_WIREGUARD_CHANGE_PEER_FLAG_REPLACE_ALLOWEDIPS; + + plp->_construct_idx_start = allowed_ips->len; + for (i_aip = 0; i_aip < n_aip; i_aip++) { + const char *aip; + NMIPAddr addrbin = {}; + int addr_family; + gboolean valid; + int prefix; + + aip = nm_wireguard_peer_get_allowed_ip(peer_data->peer, i_aip, &valid); + if (!valid + || !nm_utils_parse_inaddr_prefix_bin(AF_UNSPEC, + aip, + &addr_family, + &addrbin, + &prefix)) { + /* the address is really not expected to be invalid, because then + * the connection would not verify. Anyway, silently skip it. */ + continue; + } + + if (prefix == -1) + prefix = addr_family == AF_INET ? 32 : 128; + + g_array_append_val(allowed_ips, + ((NMPWireGuardAllowedIP){ + .family = addr_family, + .mask = prefix, + .addr = addrbin, + })); + } + plp->_construct_idx_end = allowed_ips->len; + } + + i_good++; + continue; + +skip: + memset(plp, 0, sizeof(*plp)); + } + + if (i_good == 0) + return; + + for (i = 0; i < i_good; i++) { + NMPWireGuardPeer *plp = &plpeers[i]; + guint l; + + if (plp->_construct_idx_end == 0) { + nm_assert(plp->_construct_idx_start == 0); + plp->allowed_ips = NULL; + plp->allowed_ips_len = 0; + } else { + nm_assert(plp->_construct_idx_start < plp->_construct_idx_end); + l = plp->_construct_idx_end - plp->_construct_idx_start; + plp->allowed_ips = + &g_array_index(allowed_ips, NMPWireGuardAllowedIP, plp->_construct_idx_start); + plp->allowed_ips_len = l; + } + } + *out_peers = g_steal_pointer(&plpeers); + *out_peer_flags = g_steal_pointer(&plpeer_flags); + *out_len = i_good; + *out_allowed_ips_data = g_steal_pointer(&allowed_ips); +} + +/*****************************************************************************/ + +static void +update_properties(NMDevice *device) +{ + NMDeviceWireGuard * self; + NMDeviceWireGuardPrivate * priv; + const NMPlatformLink * plink; + const NMPlatformLnkWireGuard *props = NULL; + int ifindex; + + g_return_if_fail(NM_IS_DEVICE_WIREGUARD(device)); + self = NM_DEVICE_WIREGUARD(device); + priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + ifindex = nm_device_get_ifindex(device); + props = nm_platform_link_get_lnk_wireguard(nm_device_get_platform(device), ifindex, &plink); + if (!props) { + _LOGW(LOGD_PLATFORM, "could not get wireguard properties"); + return; + } + + g_object_freeze_notify(G_OBJECT(device)); + +#define CHECK_PROPERTY_CHANGED(field, prop) \ + G_STMT_START \ + { \ + if (priv->lnk_curr.field != props->field) { \ + priv->lnk_curr.field = props->field; \ + _notify(self, prop); \ + } \ + } \ + G_STMT_END + +#define CHECK_PROPERTY_CHANGED_ARRAY(field, prop) \ + G_STMT_START \ + { \ + if (memcmp(&priv->lnk_curr.field, &props->field, sizeof(priv->lnk_curr.field)) != 0) { \ + memcpy(&priv->lnk_curr.field, &props->field, sizeof(priv->lnk_curr.field)); \ + _notify(self, prop); \ + } \ + } \ + G_STMT_END + + CHECK_PROPERTY_CHANGED_ARRAY(public_key, PROP_PUBLIC_KEY); + CHECK_PROPERTY_CHANGED(listen_port, PROP_LISTEN_PORT); + CHECK_PROPERTY_CHANGED(fwmark, PROP_FWMARK); + + g_object_thaw_notify(G_OBJECT(device)); +} + +static void +link_changed(NMDevice *device, const NMPlatformLink *pllink) +{ + NM_DEVICE_CLASS(nm_device_wireguard_parent_class)->link_changed(device, pllink); + update_properties(device); +} + +static NMDeviceCapabilities +get_generic_capabilities(NMDevice *dev) +{ + return NM_DEVICE_CAP_IS_SOFTWARE; +} + +/*****************************************************************************/ + +static gboolean +create_and_realize(NMDevice * device, + NMConnection * connection, + NMDevice * parent, + const NMPlatformLink **out_plink, + GError ** error) +{ + const char *iface = nm_device_get_iface(device); + int r; + + g_return_val_if_fail(iface, FALSE); + + r = nm_platform_link_wireguard_add(nm_device_get_platform(device), iface, out_plink); + if (r < 0) { + g_set_error(error, + NM_DEVICE_ERROR, + NM_DEVICE_ERROR_CREATION_FAILED, + "Failed to create WireGuard interface '%s' for '%s': %s", + iface, + nm_connection_get_id(connection), + nm_strerror(r)); + return FALSE; + } + + return TRUE; +} + +/*****************************************************************************/ + +static void +_secrets_cancel(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + if (priv->secrets_call_id) + nm_act_request_cancel_secrets(NULL, priv->secrets_call_id); + nm_assert(!priv->secrets_call_id); +} + +static void +_secrets_cb(NMActRequest * req, + NMActRequestGetSecretsCallId *call_id, + NMSettingsConnection * connection, + GError * error, + gpointer user_data) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(user_data); + NMDevice * device = NM_DEVICE(self); + NMDeviceWireGuardPrivate *priv; + + g_return_if_fail(NM_IS_DEVICE_WIREGUARD(self)); + g_return_if_fail(NM_IS_ACT_REQUEST(req)); + + priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + g_return_if_fail(priv->secrets_call_id == call_id); + + priv->secrets_call_id = NULL; + + if (g_error_matches(error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) + return; + + g_return_if_fail(req == nm_device_get_act_request(device)); + g_return_if_fail(nm_device_get_state(device) == NM_DEVICE_STATE_NEED_AUTH); + g_return_if_fail(nm_act_request_get_settings_connection(req) == connection); + + if (error) { + _LOGW(LOGD_ETHER, "%s", error->message); + nm_device_state_changed(device, NM_DEVICE_STATE_FAILED, NM_DEVICE_STATE_REASON_NO_SECRETS); + return; + } + + nm_device_activate_schedule_stage1_device_prepare(device, FALSE); +} + +static void +_secrets_get_secrets(NMDeviceWireGuard * self, + const char * setting_name, + NMSecretAgentGetSecretsFlags flags, + const char *const * hints) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + NMActRequest * req; + + _secrets_cancel(self); + + req = nm_device_get_act_request(NM_DEVICE(self)); + g_return_if_fail(NM_IS_ACT_REQUEST(req)); + + priv->secrets_call_id = + nm_act_request_get_secrets(req, TRUE, setting_name, flags, hints, _secrets_cb, self); + g_return_if_fail(priv->secrets_call_id); +} + +static NMActStageReturn +_secrets_handle_auth_or_fail(NMDeviceWireGuard *self, NMActRequest *req, gboolean new_secrets) +{ + NMConnection * applied_connection; + const char * setting_name; + gs_unref_ptrarray GPtrArray *hints = NULL; + + if (!nm_device_auth_retries_try_next(NM_DEVICE(self))) + return NM_ACT_STAGE_RETURN_FAILURE; + + nm_device_state_changed(NM_DEVICE(self), + NM_DEVICE_STATE_NEED_AUTH, + NM_DEVICE_STATE_REASON_NONE); + + nm_active_connection_clear_secrets(NM_ACTIVE_CONNECTION(req)); + + applied_connection = nm_act_request_get_applied_connection(req); + setting_name = nm_connection_need_secrets(applied_connection, &hints); + if (!setting_name) { + _LOGI(LOGD_DEVICE, "Cleared secrets, but setting didn't need any secrets."); + return NM_ACT_STAGE_RETURN_FAILURE; + } + + if (hints) + g_ptr_array_add(hints, NULL); + + _secrets_get_secrets(self, + setting_name, + NM_SECRET_AGENT_GET_SECRETS_FLAG_ALLOW_INTERACTION + | (new_secrets ? NM_SECRET_AGENT_GET_SECRETS_FLAG_REQUEST_NEW : 0), + (hints ? (const char *const *) hints->pdata : NULL)); + return NM_ACT_STAGE_RETURN_POSTPONE; +} + +/*****************************************************************************/ + +static void +_dns_config_changed(NMDnsManager *dns_manager, NMDeviceWireGuard *self) +{ + /* when the DNS configuration changes, we re-resolve the peer addresses. + * + * Possibly, we should also do that when the default-route changes, but it's + * hard to figure out when that happens. */ + _peers_resolve_reresolve_all(self); +} + +/*****************************************************************************/ + +static NMActStageReturn +link_config(NMDeviceWireGuard * self, + const char * reason, + LinkConfigMode config_mode, + NMDeviceStateReason *out_failure_reason) +{ + NMDeviceWireGuardPrivate * priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + nm_auto_bzero_secret_ptr NMSecretPtr wg_lnk_clear_private_key = NM_SECRET_PTR_INIT(); + NMSettingWireGuard * s_wg; + NMConnection * connection; + NMActStageReturn ret; + gs_unref_array GArray *allowed_ips_data = NULL; + NMPlatformLnkWireGuard wg_lnk; + gs_free NMPWireGuardPeer *plpeers = NULL; + gs_free NMPlatformWireGuardChangePeerFlags *plpeer_flags = NULL; + guint plpeers_len = 0; + const char * setting_name; + gboolean peers_removed; + NMPlatformWireGuardChangeFlags wg_change_flags; + int ifindex; + int r; + + NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_NONE); + + connection = nm_device_get_applied_connection(NM_DEVICE(self)); + s_wg = NM_SETTING_WIREGUARD(nm_connection_get_setting(connection, NM_TYPE_SETTING_WIREGUARD)); + g_return_val_if_fail(s_wg, NM_ACT_STAGE_RETURN_FAILURE); + + priv->link_config_last_at = nm_utils_get_monotonic_timestamp_nsec(); + + _LOGT(LOGD_DEVICE, + "wireguard link config (%s, %s)...", + reason, + _link_config_mode_to_string(config_mode)); + + _auto_default_route_init(self); + + if (!priv->dns_manager) { + priv->dns_manager = g_object_ref(nm_dns_manager_get()); + g_signal_connect(priv->dns_manager, + NM_DNS_MANAGER_CONFIG_CHANGED, + G_CALLBACK(_dns_config_changed), + self); + } + + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL) + && (setting_name = nm_connection_need_secrets(connection, NULL))) { + NMActRequest *req = nm_device_get_act_request(NM_DEVICE(self)); + + _LOGD(LOGD_DEVICE, + "Activation: connection '%s' has security, but secrets are required.", + nm_connection_get_id(connection)); + + ret = _secrets_handle_auth_or_fail(self, req, FALSE); + if (ret != NM_ACT_STAGE_RETURN_SUCCESS) { + if (ret != NM_ACT_STAGE_RETURN_POSTPONE) { + nm_assert(ret == NM_ACT_STAGE_RETURN_FAILURE); + NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_NO_SECRETS); + } + return ret; + } + } + + ifindex = nm_device_get_ip_ifindex(NM_DEVICE(self)); + if (ifindex <= 0) { + NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_CONFIG_FAILED); + return NM_ACT_STAGE_RETURN_FAILURE; + } + + _peers_update_all(self, s_wg, &peers_removed); + + wg_lnk = (NMPlatformLnkWireGuard){}; + + wg_change_flags = NM_PLATFORM_WIREGUARD_CHANGE_FLAG_NONE; + + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL) + || (NM_IN_SET(config_mode, LINK_CONFIG_MODE_REAPPLY) && peers_removed)) + wg_change_flags |= NM_PLATFORM_WIREGUARD_CHANGE_FLAG_REPLACE_PEERS; + + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL, LINK_CONFIG_MODE_REAPPLY)) { + wg_lnk.listen_port = nm_setting_wireguard_get_listen_port(s_wg); + wg_change_flags |= NM_PLATFORM_WIREGUARD_CHANGE_FLAG_HAS_LISTEN_PORT; + + wg_lnk.fwmark = priv->auto_default_route_fwmark; + wg_change_flags |= NM_PLATFORM_WIREGUARD_CHANGE_FLAG_HAS_FWMARK; + + if (nm_utils_base64secret_decode(nm_setting_wireguard_get_private_key(s_wg), + sizeof(wg_lnk.private_key), + wg_lnk.private_key)) { + wg_lnk_clear_private_key = NM_SECRET_PTR_ARRAY(wg_lnk.private_key); + wg_change_flags |= NM_PLATFORM_WIREGUARD_CHANGE_FLAG_HAS_PRIVATE_KEY; + } else { + if (NM_IN_SET(config_mode, LINK_CONFIG_MODE_FULL)) { + _LOGD(LOGD_DEVICE, "the provided private-key is invalid"); + NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_NO_SECRETS); + return NM_ACT_STAGE_RETURN_FAILURE; + } + } + } + + _peers_get_platform_list(priv, + config_mode, + &plpeers, + &plpeer_flags, + &plpeers_len, + &allowed_ips_data); + + r = nm_platform_link_wireguard_change(nm_device_get_platform(NM_DEVICE(self)), + ifindex, + &wg_lnk, + plpeers, + plpeer_flags, + plpeers_len, + wg_change_flags); + + nm_explicit_bzero(plpeers, sizeof(plpeers[0]) * plpeers_len); + + if (r < 0) { + NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_CONFIG_FAILED); + return NM_ACT_STAGE_RETURN_FAILURE; + } + + return NM_ACT_STAGE_RETURN_SUCCESS; +} + +static void +link_config_delayed(NMDeviceWireGuard *self, const char *reason) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + gint64 now; + + priv->link_config_delayed_id = 0; + + if (priv->link_config_last_at != 0) { + now = nm_utils_get_monotonic_timestamp_nsec(); + if (now < priv->link_config_last_at + LINK_CONFIG_RATE_LIMIT_NSEC) { + /* we ratelimit calls to link_config(), because we call this whenever a resolver + * completes. */ + _LOGT(LOGD_DEVICE, "wireguard link config (%s) (postponed)", reason); + priv->link_config_delayed_id = + g_timeout_add(NM_MAX((priv->link_config_last_at + LINK_CONFIG_RATE_LIMIT_NSEC - now) + / NM_UTILS_NSEC_PER_MSEC, + (gint64) 1), + link_config_delayed_ratelimit_cb, + self); + return; + } + } + + link_config(self, reason, LINK_CONFIG_MODE_ENDPOINTS, NULL); +} + +static gboolean +link_config_delayed_ratelimit_cb(gpointer user_data) +{ + link_config_delayed(user_data, "after-ratelimiting"); + return G_SOURCE_REMOVE; +} + +static gboolean +link_config_delayed_resolver_cb(gpointer user_data) +{ + link_config_delayed(user_data, "resolver-update"); + return G_SOURCE_REMOVE; +} + +static NMActStageReturn +act_stage2_config(NMDevice *device, NMDeviceStateReason *out_failure_reason) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(device); + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + NMDeviceSysIfaceState sys_iface_state; + NMDeviceStateReason failure_reason; + NMActStageReturn ret; + + sys_iface_state = nm_device_sys_iface_state_get(device); + + if (sys_iface_state == NM_DEVICE_SYS_IFACE_STATE_EXTERNAL) { + NM_SET_OUT(out_failure_reason, NM_DEVICE_STATE_REASON_NONE); + return NM_ACT_STAGE_RETURN_SUCCESS; + } + + ret = + link_config(NM_DEVICE_WIREGUARD(device), + "configure", + (sys_iface_state == NM_DEVICE_SYS_IFACE_STATE_ASSUME) ? LINK_CONFIG_MODE_ASSUME + : LINK_CONFIG_MODE_FULL, + &failure_reason); + + if (ret == NM_ACT_STAGE_RETURN_FAILURE) { + if (sys_iface_state == NM_DEVICE_SYS_IFACE_STATE_ASSUME) { + /* this never fails. */ + return NM_ACT_STAGE_RETURN_SUCCESS; + } + + nm_device_state_changed(device, NM_DEVICE_STATE_FAILED, failure_reason); + NM_SET_OUT(out_failure_reason, failure_reason); + return NM_ACT_STAGE_RETURN_FAILURE; + } + + nm_assert(NM_IN_SET(ret, NM_ACT_STAGE_RETURN_SUCCESS, NM_ACT_STAGE_RETURN_POSTPONE)); + + if (ret == NM_ACT_STAGE_RETURN_SUCCESS && _peers_resolving_cnt(priv) > 0u) { + _LOGT(LOGD_DEVICE, + "activation delayed to resolve DNS names of peers: resolving and waiting..."); + return NM_ACT_STAGE_RETURN_POSTPONE; + } + + return ret; +} + +static NMIPConfig * +_get_dev2_ip_config(NMDeviceWireGuard *self, int addr_family) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + gs_unref_object NMIPConfig *ip_config = NULL; + NMConnection * connection; + NMSettingWireGuard * s_wg; + guint n_peers; + guint i; + int ip_ifindex; + guint32 route_metric; + guint32 route_table_coerced; + gboolean auto_default_route_enabled; + + _auto_default_route_init(self); + + connection = nm_device_get_applied_connection(NM_DEVICE(self)); + + s_wg = NM_SETTING_WIREGUARD(nm_connection_get_setting(connection, NM_TYPE_SETTING_WIREGUARD)); + + /* Differences to `wg-quick`. + * + * `wg-quick` supports the "Table" setting with 3 modes: + * + * a1) "off": this is what we do with "peer-routes" disabled. + * + * a2) an explicit routing table. This is our behavior with "peer-routes" on. In this case + * we honor the "ipv4.route-table" and "ipv6.route-table" settings. One difference is that + * `wg-quick` would resolve table names from /etc/iproute2/rt_tables. Our connection profiles + * only contain table numbers, so that conversion from name to table must have happened + * before already. + * + * a3) "auto" (the default). In this case, `wg-quick` would only add the route to the + * main table, if the AllowedIP range is not yet reachable on the link. With "peer-routes" + * enabled, we don't check for that and always add the routes to the main-table + * (with 'ipv4.route-table' and 'ipv6.route-table' set to zero or RT_TABLE_MAIN (254)). + * + * Also, in "auto" mode, `wg-quick` would add special handling for /0 routes and pick + * an empty table to configure policy routing to avoid routing loops. This handling + * of routing-loops via policy routing is not yet done, and requires a separate solution + * from constructing the peer-routes here. + */ + if (!nm_setting_wireguard_get_peer_routes(s_wg)) + return NULL; + + ip_ifindex = nm_device_get_ip_ifindex(NM_DEVICE(self)); + + if (ip_ifindex <= 0) + return NULL; + + route_metric = nm_device_get_route_metric(NM_DEVICE(self), addr_family); + + route_table_coerced = + nm_platform_route_table_coerce(nm_device_get_route_table(NM_DEVICE(self), addr_family)); + + auto_default_route_enabled = (addr_family == AF_INET) ? priv->auto_default_route_enabled_4 + : priv->auto_default_route_enabled_6; + + n_peers = nm_setting_wireguard_get_peers_len(s_wg); + for (i = 0; i < n_peers; i++) { + NMWireGuardPeer *peer = nm_setting_wireguard_get_peer(s_wg, i); + guint n_aips; + guint j; + + n_aips = nm_wireguard_peer_get_allowed_ips_len(peer); + for (j = 0; j < n_aips; j++) { + NMPlatformIPXRoute rt; + NMIPAddr addrbin; + const char * aip; + gboolean valid; + int prefix; + guint32 rtable_coerced; + + aip = nm_wireguard_peer_get_allowed_ip(peer, j, &valid); + + if (!valid + || !nm_utils_parse_inaddr_prefix_bin(addr_family, aip, NULL, &addrbin, &prefix)) + continue; + + if (prefix < 0) + prefix = (addr_family == AF_INET) ? 32 : 128; + + if (prefix == 0) { + NMSettingIPConfig *s_ip; + + s_ip = nm_connection_get_setting_ip_config(connection, addr_family); + if (nm_setting_ip_config_get_never_default(s_ip)) + continue; + } + + if (!ip_config) { + ip_config = nm_device_ip_config_new(NM_DEVICE(self), addr_family); + nm_ip_config_set_config_flags(ip_config, + NM_IP_CONFIG_FLAGS_IGNORE_MERGE_NO_DEFAULT_ROUTES, + 0); + } + + nm_utils_ipx_address_clear_host_address(addr_family, &addrbin, NULL, prefix); + + rtable_coerced = route_table_coerced; + + if (prefix == 0 && auto_default_route_enabled) { + /* In auto-default-route mode, we place the default route in a table that + * has the same number as the fwmark. wg-quick does that too. If you don't + * like that, configure the rules and the default-route explicitly in the + * connection profile. */ + rtable_coerced = nm_platform_route_table_coerce(priv->auto_default_route_fwmark); + } + + if (addr_family == AF_INET) { + rt.r4 = (NMPlatformIP4Route){ + .network = addrbin.addr4, + .plen = prefix, + .ifindex = ip_ifindex, + .rt_source = NM_IP_CONFIG_SOURCE_USER, + .table_coerced = rtable_coerced, + .metric = route_metric, + }; + } else { + rt.r6 = (NMPlatformIP6Route){ + .network = addrbin.addr6, + .plen = prefix, + .ifindex = ip_ifindex, + .rt_source = NM_IP_CONFIG_SOURCE_USER, + .table_coerced = rtable_coerced, + .metric = route_metric, + }; + } + + nm_ip_config_add_route(ip_config, &rt.rx, NULL); + } + } + + return g_steal_pointer(&ip_config); +} + +static NMActStageReturn +act_stage3_ip_config_start(NMDevice * device, + int addr_family, + gpointer * out_config, + NMDeviceStateReason *out_failure_reason) +{ + gs_unref_object NMIPConfig *ip_config = NULL; + + ip_config = _get_dev2_ip_config(NM_DEVICE_WIREGUARD(device), addr_family); + + nm_device_set_dev2_ip_config(device, addr_family, ip_config); + + return NM_DEVICE_CLASS(nm_device_wireguard_parent_class) + ->act_stage3_ip_config_start(device, addr_family, out_config, out_failure_reason); +} + +static guint32 +get_configured_mtu(NMDevice *device, NMDeviceMtuSource *out_source, gboolean *out_force) +{ + /* When "MTU" for `wg-quick up` is unset, it calls `ip route get` for + * each configured endpoint, to determine the suitable MTU how to reach + * each endpoint. + * For `wg-quick` this works very well, because whenever the script runs it + * determines the best setting at that point in time. It's simply not concerned + * with what happens later (and it's not around anyway). + * + * NetworkManager sticks around, so the right MTU would need to be re-determined + * whenever anything relevant changes. Which basically means, to re-evaluate whenever + * something related to addresses or routing changes (which happens all the time). + * + * The correct MTU indeed depends on the MTU setting of other interfaces (or routes). + * But it's still odd, that activating/deactivating a seemingly unrelated interface + * would trigger an MTU change. It's odd to explain/document and odd to implemented + * -- despite this being the reality. + * + * For now, only support configuring an explicit MTU, or leave the setting untouched. + * The same limitation also applies to other "ip-tunnel" types, where we could use + * similar smarts for autodetecting the MTU. + */ + return nm_device_get_configured_mtu_from_connection(device, + NM_TYPE_SETTING_WIREGUARD, + out_source); +} + +static void +_device_cleanup(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + _peers_remove_all(self); + + _secrets_cancel(self); + + priv->auto_default_route_initialized = FALSE; + priv->auto_default_route_priority_initialized = FALSE; +} + +static void +device_state_changed(NMDevice * device, + NMDeviceState new_state, + NMDeviceState old_state, + NMDeviceStateReason reason) +{ + if (new_state <= NM_DEVICE_STATE_ACTIVATED) + return; + + _device_cleanup(NM_DEVICE_WIREGUARD(device)); +} + +/*****************************************************************************/ + +static gboolean +can_reapply_change(NMDevice * device, + const char *setting_name, + NMSetting * s_old, + NMSetting * s_new, + GHashTable *diffs, + GError ** error) +{ + if (nm_streq(setting_name, NM_SETTING_WIREGUARD_SETTING_NAME)) { + /* Most, but not all WireGuard settings can be reapplied. Whitelist. + * + * MTU cannot be reapplied. */ + return nm_device_hash_check_invalid_keys(diffs, + NM_SETTING_WIREGUARD_SETTING_NAME, + error, + NM_SETTING_WIREGUARD_FWMARK, + NM_SETTING_WIREGUARD_IP4_AUTO_DEFAULT_ROUTE, + NM_SETTING_WIREGUARD_IP6_AUTO_DEFAULT_ROUTE, + NM_SETTING_WIREGUARD_LISTEN_PORT, + NM_SETTING_WIREGUARD_PEERS, + NM_SETTING_WIREGUARD_PEER_ROUTES, + NM_SETTING_WIREGUARD_PRIVATE_KEY, + NM_SETTING_WIREGUARD_PRIVATE_KEY_FLAGS); + } + + return NM_DEVICE_CLASS(nm_device_wireguard_parent_class) + ->can_reapply_change(device, setting_name, s_old, s_new, diffs, error); +} + +static void +reapply_connection(NMDevice *device, NMConnection *con_old, NMConnection *con_new) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(device); + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + gs_unref_object NMIPConfig *ip4_config = NULL; + gs_unref_object NMIPConfig *ip6_config = NULL; + NMDeviceState state = nm_device_get_state(device); + + NM_DEVICE_CLASS(nm_device_wireguard_parent_class)->reapply_connection(device, con_old, con_new); + + if (state >= NM_DEVICE_STATE_CONFIG) { + priv->auto_default_route_refresh = TRUE; + link_config(NM_DEVICE_WIREGUARD(device), "reapply", LINK_CONFIG_MODE_REAPPLY, NULL); + } + + if (state >= NM_DEVICE_STATE_IP_CONFIG) { + ip4_config = _get_dev2_ip_config(self, AF_INET); + ip6_config = _get_dev2_ip_config(self, AF_INET6); + + nm_device_set_dev2_ip_config(device, AF_INET, ip4_config); + nm_device_set_dev2_ip_config(device, AF_INET6, ip6_config); + } +} + +/*****************************************************************************/ + +static void +update_connection(NMDevice *device, NMConnection *connection) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(device); + NMSettingWireGuard * s_wg = + NM_SETTING_WIREGUARD(nm_connection_get_setting(connection, NM_TYPE_SETTING_WIREGUARD)); + const NMPObject * obj_wg; + const NMPObjectLnkWireGuard *olnk_wg; + guint i; + + if (!s_wg) { + s_wg = NM_SETTING_WIREGUARD(nm_setting_wireguard_new()); + nm_connection_add_setting(connection, NM_SETTING(s_wg)); + } + + g_object_set(s_wg, + NM_SETTING_WIREGUARD_FWMARK, + (guint) priv->lnk_curr.fwmark, + NM_SETTING_WIREGUARD_LISTEN_PORT, + (guint) priv->lnk_curr.listen_port, + NULL); + + obj_wg = NMP_OBJECT_UP_CAST(nm_platform_link_get_lnk_wireguard(nm_device_get_platform(device), + nm_device_get_ip_ifindex(device), + NULL)); + if (!obj_wg) + return; + + olnk_wg = &obj_wg->_lnk_wireguard; + + for (i = 0; i < olnk_wg->peers_len; i++) { + nm_auto_unref_wgpeer NMWireGuardPeer *peer = NULL; + const NMPWireGuardPeer * ppeer = &olnk_wg->peers[i]; + + peer = nm_wireguard_peer_new(); + + _nm_wireguard_peer_set_public_key_bin(peer, ppeer->public_key); + + nm_setting_wireguard_append_peer(s_wg, peer); + } +} + +/*****************************************************************************/ + +static void +get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(object); + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + switch (prop_id) { + case PROP_PUBLIC_KEY: + g_value_take_variant(value, + g_variant_new_fixed_array(G_VARIANT_TYPE_BYTE, + priv->lnk_curr.public_key, + sizeof(priv->lnk_curr.public_key), + 1)); + break; + case PROP_LISTEN_PORT: + g_value_set_uint(value, priv->lnk_curr.listen_port); + break; + case PROP_FWMARK: + g_value_set_uint(value, priv->lnk_curr.fwmark); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec); + break; + } +} + +/*****************************************************************************/ + +static void +nm_device_wireguard_init(NMDeviceWireGuard *self) +{ + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + c_list_init(&priv->lst_peers_head); + priv->peers = g_hash_table_new(_peer_data_hash, _peer_data_equal); +} + +static void +dispose(GObject *object) +{ + NMDeviceWireGuard *self = NM_DEVICE_WIREGUARD(object); + + _device_cleanup(self); + + G_OBJECT_CLASS(nm_device_wireguard_parent_class)->dispose(object); +} + +static void +finalize(GObject *object) +{ + NMDeviceWireGuard * self = NM_DEVICE_WIREGUARD(object); + NMDeviceWireGuardPrivate *priv = NM_DEVICE_WIREGUARD_GET_PRIVATE(self); + + nm_explicit_bzero(priv->lnk_curr.private_key, sizeof(priv->lnk_curr.private_key)); + + if (priv->dns_manager) { + g_signal_handlers_disconnect_by_func(priv->dns_manager, _dns_config_changed, self); + g_object_unref(priv->dns_manager); + } + + g_hash_table_destroy(priv->peers); + + G_OBJECT_CLASS(nm_device_wireguard_parent_class)->finalize(object); +} + +static const NMDBusInterfaceInfoExtended interface_info_device_wireguard = { + .parent = NM_DEFINE_GDBUS_INTERFACE_INFO_INIT( + NM_DBUS_INTERFACE_DEVICE_WIREGUARD, + .properties = NM_DEFINE_GDBUS_PROPERTY_INFOS( + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("PublicKey", + "ay", + NM_DEVICE_WIREGUARD_PUBLIC_KEY), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("ListenPort", + "q", + NM_DEVICE_WIREGUARD_LISTEN_PORT), + NM_DEFINE_DBUS_PROPERTY_INFO_EXTENDED_READABLE("FwMark", + "u", + NM_DEVICE_WIREGUARD_FWMARK), ), ), +}; + +static void +nm_device_wireguard_class_init(NMDeviceWireGuardClass *klass) +{ + GObjectClass * object_class = G_OBJECT_CLASS(klass); + NMDBusObjectClass *dbus_object_class = NM_DBUS_OBJECT_CLASS(klass); + NMDeviceClass * device_class = NM_DEVICE_CLASS(klass); + + object_class->get_property = get_property; + object_class->dispose = dispose; + object_class->finalize = finalize; + + dbus_object_class->interface_infos = NM_DBUS_INTERFACE_INFOS(&interface_info_device_wireguard); + + device_class->connection_type_supported = NM_SETTING_WIREGUARD_SETTING_NAME; + device_class->connection_type_check_compatible = NM_SETTING_WIREGUARD_SETTING_NAME; + device_class->link_types = NM_DEVICE_DEFINE_LINK_TYPES(NM_LINK_TYPE_WIREGUARD); + + device_class->state_changed = device_state_changed; + device_class->create_and_realize = create_and_realize; + device_class->act_stage2_config = act_stage2_config; + device_class->act_stage2_config_also_for_external_or_assume = TRUE; + device_class->act_stage3_ip_config_start = act_stage3_ip_config_start; + device_class->get_generic_capabilities = get_generic_capabilities; + device_class->link_changed = link_changed; + device_class->update_connection = update_connection; + device_class->can_reapply_change = can_reapply_change; + device_class->reapply_connection = reapply_connection; + device_class->get_configured_mtu = get_configured_mtu; + device_class->get_extra_rules = get_extra_rules; + device_class->coerce_route_table = coerce_route_table; + + obj_properties[PROP_PUBLIC_KEY] = + g_param_spec_variant(NM_DEVICE_WIREGUARD_PUBLIC_KEY, + "", + "", + G_VARIANT_TYPE("ay"), + NULL, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_LISTEN_PORT] = g_param_spec_uint(NM_DEVICE_WIREGUARD_LISTEN_PORT, + "", + "", + 0, + G_MAXUINT16, + 0, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + obj_properties[PROP_FWMARK] = g_param_spec_uint(NM_DEVICE_WIREGUARD_FWMARK, + "", + "", + 0, + G_MAXUINT32, + 0, + G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); + + g_object_class_install_properties(object_class, _PROPERTY_ENUMS_LAST, obj_properties); +} + +/*************************************************************/ + +#define NM_TYPE_WIREGUARD_DEVICE_FACTORY (nm_wireguard_device_factory_get_type()) +#define NM_WIREGUARD_DEVICE_FACTORY(obj) \ + (G_TYPE_CHECK_INSTANCE_CAST((obj), NM_TYPE_WIREGUARD_DEVICE_FACTORY, NMWireGuardDeviceFactory)) + +static NMDevice * +create_device(NMDeviceFactory * factory, + const char * iface, + const NMPlatformLink *plink, + NMConnection * connection, + gboolean * out_ignore) +{ + return g_object_new(NM_TYPE_DEVICE_WIREGUARD, + NM_DEVICE_IFACE, + iface, + NM_DEVICE_TYPE_DESC, + "WireGuard", + NM_DEVICE_DEVICE_TYPE, + NM_DEVICE_TYPE_WIREGUARD, + NM_DEVICE_LINK_TYPE, + NM_LINK_TYPE_WIREGUARD, + NULL); +} + +NM_DEVICE_FACTORY_DEFINE_INTERNAL( + WIREGUARD, + WireGuard, + wireguard, + NM_DEVICE_FACTORY_DECLARE_LINK_TYPES(NM_LINK_TYPE_WIREGUARD) + NM_DEVICE_FACTORY_DECLARE_SETTING_TYPES(NM_SETTING_WIREGUARD_SETTING_NAME), + factory_class->create_device = create_device;) |